This reverts commit 19eaad1400eab34e97ec4467cd2ab694d1caf20c which is ee0415681eb661efa1eb2db7acc263f2c7df1e23 upstream.

This commit is not a stable candidate and was backported without needed dependencies that results in the resctrl tests unable to compile.

Signed-off-by: Reinette Chatre reinette.chatre@intel.com ---

The same commit is present in v5.12.y where it also causes the resctrl tests to fail to compile. I did not submit a revert against v5.12.y because it is EOL.

tools/testing/selftests/resctrl/resctrl.h | 6 +-- tools/testing/selftests/resctrl/resctrlfs.c | 52 +++++---------------- 2 files changed, 12 insertions(+), 46 deletions(-)

diff --git a/tools/testing/selftests/resctrl/resctrl.h b/tools/testing/selftests/resctrl/resctrl.h index 9dcc96e1ad3d..36da6136af96 100644 --- a/tools/testing/selftests/resctrl/resctrl.h +++ b/tools/testing/selftests/resctrl/resctrl.h @@ -28,10 +28,6 @@ #define RESCTRL_PATH "/sys/fs/resctrl" #define PHYS_ID_PATH "/sys/devices/system/cpu/cpu" #define CBM_MASK_PATH "/sys/fs/resctrl/info" -#define L3_PATH "/sys/fs/resctrl/info/L3" -#define MB_PATH "/sys/fs/resctrl/info/MB" -#define L3_MON_PATH "/sys/fs/resctrl/info/L3_MON" -#define L3_MON_FEATURES_PATH "/sys/fs/resctrl/info/L3_MON/mon_features"

#define PARENT_EXIT(err_msg) \ do { \ @@ -83,7 +79,7 @@ int remount_resctrlfs(bool mum_resctrlfs); int get_resource_id(int cpu_no, int *resource_id); int umount_resctrlfs(void); int validate_bw_report_request(char *bw_report); -bool validate_resctrl_feature_request(const char *resctrl_val); +bool validate_resctrl_feature_request(char *resctrl_val); char *fgrep(FILE *inf, const char *str); int taskset_benchmark(pid_t bm_pid, int cpu_no); void run_benchmark(int signum, siginfo_t *info, void *ucontext); diff --git a/tools/testing/selftests/resctrl/resctrlfs.c b/tools/testing/selftests/resctrl/resctrlfs.c index b57170f53861..4174e48e06d1 100644 --- a/tools/testing/selftests/resctrl/resctrlfs.c +++ b/tools/testing/selftests/resctrl/resctrlfs.c @@ -616,56 +616,26 @@ char *fgrep(FILE *inf, const char *str) * validate_resctrl_feature_request - Check if requested feature is valid. * @resctrl_val: Requested feature * - * Return: True if the feature is supported, else false + * Return: 0 on success, non-zero on failure */ -bool validate_resctrl_feature_request(const char *resctrl_val) +bool validate_resctrl_feature_request(char *resctrl_val) { - struct stat statbuf; + FILE *inf = fopen("/proc/cpuinfo", "r"); bool found = false; char *res; - FILE *inf;

- if (!resctrl_val) + if (!inf) return false;

- if (remount_resctrlfs(false)) - return false; + res = fgrep(inf, "flags");

- if (!strncmp(resctrl_val, CAT_STR, sizeof(CAT_STR))) { - if (!stat(L3_PATH, &statbuf)) - return true; - } else if (!strncmp(resctrl_val, MBA_STR, sizeof(MBA_STR))) { - if (!stat(MB_PATH, &statbuf)) - return true; - } else if (!strncmp(resctrl_val, MBM_STR, sizeof(MBM_STR)) || - !strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR))) { - if (!stat(L3_MON_PATH, &statbuf)) { - inf = fopen(L3_MON_FEATURES_PATH, "r"); - if (!inf) - return false; - - if (!strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR))) { - res = fgrep(inf, "llc_occupancy"); - if (res) { - found = true; - free(res); - } - } - - if (!strncmp(resctrl_val, MBM_STR, sizeof(MBM_STR))) { - res = fgrep(inf, "mbm_total_bytes"); - if (res) { - free(res); - res = fgrep(inf, "mbm_local_bytes"); - if (res) { - found = true; - free(res); - } - } - } - fclose(inf); - } + if (res) { + char *s = strchr(res, ':'); + + found = s && !strstr(s, resctrl_val); + free(res); } + fclose(inf);

return found; }